A light ray gets refracted from multiple transparent mediums with different refractive indices and, lastly, emerges out to the first medium. The incident ray is ____ the emergent ray.

During refraction through a glass slab, the incident ray is not parallel to ____.

• Incident and emergent ray are parallel in refraction through a glass slab.
• Incident ray can be parallel to normal line.

The incident ray is ____ to the refracted ray.

During normal incidence, the angle of incidence ___ the angle of refraction.

The unit of the refractive index is ___.

Observe the picture given below. In which position is the fish actually located?

Which of the following does not refract light?

A light ray traveling through water enters air. It ___.

A light ray traveling through air enters a glass slab. It ___.

____ is a cuboidal piece of glass.

A beam of light enters the air from a magnifying glass. It ___.

A coin is lying at the bottom of a tumbler filled with water. How many mediums does the light from the coin go through to reach the eyes of the observer?

The actual tip of a pencil lies at the bottom of a tumbler filled with water. However, its position appears to be raised because ___.

Pick the odd one out.

An eye lens ____ light in order to focus an image on the retina.

Observe the picture below which shows a man aiming at a fish under water. Which of the following statements is correct?